21086572

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{127}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 41746432

約数和(自身を除く): 20659860

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 103, 124, 127, 206, 254, 403, 412, 508, 806, 1339, 1612, 1651, 2678, 3193, 3302, 3937, 5356, 6386, 6604, 7874, 12772, 13081, 15748, 26162, 41509, 51181, 52324, 83018, 102362, 166036, 170053, 204724, 340106, 405511, 680212, 811022, 1622044, 5271643, 10543286, 21086572]

約数ペア:

[(1, 21086572), (2, 10543286), (4, 5271643), (13, 1622044), (26, 811022), (31, 680212), (52, 405511), (62, 340106), (103, 204724), (124, 170053), (127, 166036), (206, 102362), (254, 83018), (403, 52324), (412, 51181), (508, 41509), (806, 26162), (1339, 15748), (1612, 13081), (1651, 12772), (2678, 7874), (3193, 6604), (3302, 6386), (3937, 5356)]